This plant is important for Apple and likely scores of other electronics makers because it produces 70 percent of the world’s supply of a polymer — polyvinylidene fluoride (PVDF) — critical to lithium-ion battery manufacturing, specifically the type of battery used in iPods.

that's crazy that nearly three quarters of global production comes from one factory.

i also find it funny how it's ipods first and foremost! but it's "likely" important to other products.